Issue 4, 2024

Nearly three-dimensional Dirac fermions in an organic crystalline material unveiled by electron spin resonance

Abstract

Materials containing Dirac fermions (DFs) have unique electronic properties, and have been extensively studied. Electron spin resonance revealed that α-ET2I3 (ET = bis(ethylenedithio)-tetrathiafulvalene) at 1 bar contained a nearly three-dimensional DFs above ∼100 K coexisting with standard fermions. The close charge-transfer ET–I3 interactions account for temperature-sensitive three-dimensional (3D) band structures and temperature-independent resistivity behaviour. As 3D band structures cannot be depicted in a four-dimensional space, the analysis method proposed herein provides a general way to present important and easy-to-understand information of such band structures that cannot be obtained otherwise.

Graphical abstract: Nearly three-dimensional Dirac fermions in an organic crystalline material unveiled by electron spin resonance

Supplementary files

Article information

Article type
Paper
Submitted
30 aug 2023
Accepted
31 okt 2023
First published
01 nov 2023
This article is Open Access
Creative Commons BY-NC license

Mater. Adv., 2024,5, 1492-1501

Nearly three-dimensional Dirac fermions in an organic crystalline material unveiled by electron spin resonance

R. Oka, K. Ohara, N. Tajima, T. Shimada and T. Naito, Mater. Adv., 2024, 5, 1492 DOI: 10.1039/D3MA00619K

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